CENTIGRID® MAGNETIC-LATCHING COMMERCIAL RELAYS SERIES 122C DPDT CMOS COMPATIBLE SERIES DESIGNATION 122C RELAY TYPE DPDT general-purpose magnetic-latching relay with internal power MOSFET driver and diode coil transient suppression DESCRIPTION The 122C Centigrid® magnetic-latching relay is an ultraminiature, hermetically sealed, armature relay capable of being directly driven by most IC logic families. Its low profile height and .100” grid spaced terminals, which precludes the need for spreader pads, make it ideal for applications where extreme packaging density and/or close PC board spacing are required. CENTIGRID® AND TO-5 The basic operating function and internal structure are similar to Teledyne’s TO-5, 422 relay series. The 122C is capable of meeting Teledyne Relays’ T2R® requirements. The following unique construction features and manufacturing techniques provide overall high reliability and excellent resistance to environmental extremes: • All welded construction. • Unique uni-frame design providing high magnetic efficiency and mechanical rigidity. • High force/mass ratios to withstand shock and vibration. • Advanced cleaning techniques provide maximum assurance of internal cleanliness. • Precious metal alloy contact material with gold plating assures excellent high current and dry circuit switching capabilities. PRINCIPLE OF OPERATION PERMANENT MAGNET MAGNETIC CIRCUIT B The Series 122C relay has internal silicon diodes for coil suppression, Zener diodes to protect the MOSFET gate inputs, and N-channel enhancement-mode MOSFET chips, which enable direct relay interfacing with most microprocessor and IC logic families (CMOS, TTL and MOS). The 122C magnetic-latching relay is ideally suited for applications where coil operating power must be minimized. The relays can be operated with a short-duration pulse. After the contacts have transferred, no external coil power is required. The magnetic-latching feature of the Series 122C relay provides a “memory” capability, since the relays will not reset upon removal of coil power. By virtue of its inherently low intercontact capacitance and contact circuit losses, the 122C relay has proven to be an excellent ultraminiature RF switch for frequency ranges well into the UHF spectrum. A typical RF application for this Centigrid® relay is in handheld radio transceivers, wherein the combined features of good RF performance, small size, low coil power dissipation and high reliability make it a preferred method of transmit-receive switching (see Figure 1). MAGNETIC CIRCUIT A SOFT IRON CORE A SOFT IRON FRAME Energizing Coil B produces a magnetic field COIL A COIL B opposing the holding flux of the permanent magnet in Circuit B. As this net holding force decreases, the attractive force in the air gap of AIR GAP STATIONARY Circuit A, which also results from the flux of the CONTACT permanent magnet, becomes great enough to break the armature free of Core B, and snap it SOFT IRON MOVING ARMATURE CONTACT into a closed position against Core A. The armature then remains in this position upon removal of energy from Coil B, but will snap back to position B upon energizing Coil A. Since operation depends upon cancellation of a magnetic field, it is necessary to apply the correct polarity to the relay coils as indicated on the relay schematic. When latching relays are installed in equipment, the latch and reset coils should not be pulsed simultaneously. Coils should not be pulsed with less than rated coil voltage and the pulse width should be a minimum of three times the specified operate time of the relay. If these conditions are not followed, it is possible for the relay to be in the magnetically neutral position. ©2003 TELEDYNE RELAYS ENVIRONMENTAL AND PHYSICAL SPECIFICATIONS –65°C to +125°C Temperature Storage (Ambient) Operating –55°C to +85°C Vibration (General Note 1) 30 g’s to 3000 Hz Shock (General Note 1) 100 g’s, 6 msec, half-sine Acceleration 50 g’s Enclosure Hermetically sealed Weight 0.10 oz. (2.75g) max. SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE www.teledynerelays.com 122C Page 88 122C/1203/Q1 SERIES 122C GENERAL ELECTRICAL SPECIFICATIONS (–65°C to +125°C unless otherwise noted) (Notes 2 & 3) Contact Arrangement Rated Duty 2 Form C (DPDT) Continuous Contact Resistance 0.125 ohm max. before life; 0.225 ohm max. after life at 1A/28Vdc (measured 1/8" from header) Contact Load Ratings (DC) (See Fig. 2 for other DC resistive voltage/current ratings) Resistive: Inductive: Lamp: Low Level: 1 Amp/28Vdc 200 mA/28Vdc (320 mH) 100 mA/28Vdc 10 to 50 µA/10 to 50mV Resistive: 250 mA/115Vac, 60 and 400 Hz (Case not grounded) 100 mA/115Vac, 60 and 400 Hz (Case grounded) Contact Load Ratings (AC) Contact Life Ratings 10,000,000 cycles (typical) at low level 1,000,000 cycles (typical) at 0.5A/28Vdc resistive 100,000 cycles min. at all other loads specified above Contact Overload Rating Contact Carry Rating Operate Time Contact Bounce Minimum Operate Pulse Intercontact Capacitance Insulation Resistance (Note 4) Dielectric Strength (Note 4) Negative Coil Transient (Vdc) Diode P.I.V. (Vdc) Zener Voltage (Vdc) Zener Leakage Current @ 15.2 Vdc (µA) Gate Voltage to Turn Off (Vdc) Power FET Characteristics Gate Voltage to Turn On (Vdc) –65°C to +125°C Drain-Source (Vdc) 2A/28Vdc Resistive (100 cycles min.) Contact factory 1.5 msec max. at nominal rated coil voltage @ 25°C 2.0 msec max. 4.5 msec width @ rated voltage 0.4 pf typical 10,000 megohms min. between mutually isolated terminals Atmospheric pressure: 500 Vrms/60Hz 70,000 ft.: 125 Vrms/60Hz 1.0 max. 100 min. 17 min. to 23 max. 2.5 max. 0.5 max. 3.8 min (Note 8) 55 max. BASE PART NUMBERS (See Notes 3, 10) 122C-6 122C-9 122C-12 122C-18 122C-26 Nom. Max. Max. Min. 5.0 5.6 114.9 82.2 6.0 8.0 57.0 41.6 9.0 12.0 37.2 27.4 12.0 16.0 27.8 20.5 18.0 24.0 18.2 13.7 26.5 32.0 15.2 11.4 Coil Operating Power @25°C and Rated Voltage (mW) Nom. 505 296 288 287 286 351 Latch and Reset Voltage (Vdc) Max. 3.5 4.5 6.8 9.0 13.5 18.0 Coil Voltage (Vdc) Coil Current (mAdc @25°C) (Note 9) PERFORMANCE CURVES (NOTE 2) TYPICAL RF PERFORMANCE CENTIGRID® AND TO-5 122C-5 TYPICAL DC CONTACT RATING (RESISTIVE) 0 INSERT ION LO .1 SS 300 .3 10 1.92 20 1.22 ) (VSWR N LOSS RETUR S T C NTA S CO ROS N AC 30 40 50 IO OLAT IS 60 122C Page 89 0.5 1.02 1.01 .1 .5 ES S POL CROS TION A ISOLA 70 .01 1.07 1.00 VSWR dB .4 LOAD VOLTAGE (VDC) .2 250 200 150 100 50 1.00 1.0 0 0.1 0.2 0.3 0.4 0.5 0.6 FREQUENCY (GHz) LOAD CURRENT (AMPS DC) FIGURE 1 FIGURE 2 SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE www.teledynerelays.com 0.7 0.8 0.9 1.0 ©2003 TELEDYNE RELAYS 122C/1203/Q1 SERIES 122C OUTLINE DIMENSIONS SCHEMATIC DIAGRAMS CASE DETAIL .335 MAX. (8.51) .435 MAX. (11.05) TERMINAL LOCATIONS (Viewed from Terminals; Numbers for Reference Only) .035 ±.010 .375 MAX. (.89 ±.25) (9.53) .031 ±.003 (.79 ±.08) 1 9 8 .100 ±.010 7 (2.54 ±.25) TYP 6 .75 MIN. (19.05) (+.051) (.43) (–.025) PIN 10: +SUPPLY PIN 5: –SUPPLY PINS 4 & 9: GATE 10 .295 MAX. (7.49) +.002 .017 –.001 COIL B OUTPUT DIA. 2 .475 MAX. (12.07) 3 5 4 COIL A INPUT .200 ±.010 (5.08 ±0.25) DIMENSIONS ARE SHOWN IN INCHES (MILLIMETERS) SCHEMATIC IS VIEWED FROM TERMINALS. CONTACTS SHOWN IN POSITION RESULTING WHEN COIL A LAST ENERGIZED. 10 LEADS TYPICAL CMOS INTERFACE CIRCUIT Vr Vcc GENERAL NOTES 1. Relay contacts will exhibit no chatter in excess of 10 µsec or transfer in excess of 1 µsec. 2. “Typical” characteristics are based on available data and are best estimates. No on-going verification tests are performed. 3. Unless otherwise specified, parameters are initial values. 4. Pins 4, 5 and 9 must be shorted when tested for Insulation Resistance and Dielectric Withstanding Voltage. 5. Unless otherwise specified, relays will be supplied with either gold-plated or solder-coated leads. 6. The slash and characters appearing after the slash are not marked on the relay. 7. Screened HI-REL versions available. Contact factory. 8. Maximum rated gate voltage = 15 VDC. 9. Measured for 5 sec max. Includes allowance for “on” resistance of MOSFET. 10. Pin 10 Notes: Logic 1 activates the coil. Logic 1 must not be applied to A and B simultaneously Vcc = logic bias power. Vr = coil energization voltage. Logic element Pin 9 Pin 4 A 1 = 3.8 to 15Vdc B 0 = 0.5Vdc min. Pin 5 Teledyne Part Numbering System for Relays CENTIGRID® AND TO-5 122C Z M9 - 26 / S Q Q= Solder Coated Leads G= Gold Plated Leads (Notes 5 and 6) Relay Series Optional Ground Pin (See Appendix) S= .187" leads (Note 6) Pad Option (See Appendix) Coil Voltage ©2003 TELEDYNE RELAYS SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE www.teledynerelays.com 122C Page 90 122C/1203/Q1